166 PHYTOPHAGA. 
Tibiz not dilated at the apex. 
Elytra gibbous. . . 2 2 1 1 ww ee ee ee ee ee we «Species 1-4. 
Elytra more or less convex. 
Elytra conjointly rounded at the apex. 
Prothorax immaculate or spotted, the elytra without distinct markings. 
Prothorax with three or more small black spots or streaks . . . . . Species 5-14. 
Prothorax immaculate. . . . » oe. « ss . . Species 15-17. 
Prothorax and elytra each with three broad black vittee Loe . . Species 18. 
Elytra less rounded behind, the apices sharper or attenuate (especially i in 19 ). | 
Prothorax with three or more small black spots or streaks . . . . . . Species 19-21. 
Prothorax immaculate, or, at most, with a short black median streak . . Species 22-25. 
Tibize obtusely dilated at the apex . . » oe ew ew we ee.) «Species 26. 
Tibize very broadly, subangularly dilated at the 2 apex. . . . . . . « . . Species 27. 
J 1, Physonota alutacea, (Tab. VIII. fig. 12, 2, var. cyrtodes.) 
Physonota alutacea, Boh. Monogr. Cassid. ii. p. 191+, and iv. p. 243°; Cat. Col. Ins. Brit. Mus. 
ix. p. 98°. 
Physonota cyrtodes, Boh. Monogr. Cassid. ii. p. 192*, and iv. p. 243°; Cat. Col. Ins. Brit. Mus. 
ix. p. 98°. 
Hab. Mexico! (ex coll. Sturm), Presidio de Mazatlan (Forrer), Guajuco in Nuevo 
Leon (Dr. Palmer), Monterey in Nuevo Leon, Ventanas in Durango, Cordova, Tapa- 
chula in Chiapas (Hége), Puebla, Matamoros Izucar, Yolos, Capulalpam, San Andres 
Tuxtla, Vera Cruz 3, Juquila (Sal/é), Amula, Chilpancingo, and Acapulco in Guerrero, 
Atoyac in Vera Cruz, Teapa in Tabasco (H. H. Smith), Jalapa (F. D. G.), Oaxaca 
(Sallé, Hoge), Campeche in Yucatan (Sallé), Temax in North Yucatan (Gawmer) ; 
British Honpuras, R. Hondo, R. Sarstoon (Blancaneaux); Guatemana® (Sallé, 
Scherzer ®), Cubilguitz, Tamahu, Chacoj, San Juan, Panzos, and San Gerénimo in 
Vera Paz, El Reposo, Volcan de Atitlan, Pantaleon, Zapote (Champion); Nicaragua, 
. Chontales (Belt, Janson) ; Costa Rica (Van Patten), San Francisco (Rogers); Panama, 
Volcan de Chiriqui, Caldera, Bugaba (Champion), Chiriqui (Ribbe).—CoLomsta 1 ; 
VENEZUELA °. 
This is one of the most abundant species of Cassidide within our limits, extending 
northwards into the Mexican States of Nuevo Leon and Durango. Two forms of this 
species occur, connected by intermediate gradations, one with the elytra sparsely and 
rather finely punctate (P. alutacea), the other with the elytra coarsely and more 
closely punctate (P. cyrtodes) ; the latter usually has the black spots on the prothorax 
and elytra larger and more distinct. A female specimen of the form cyrtodes, from 
Amula, is figured. 
2. Physonota nitidicollis. (Tab. VIII. fig. 13.) 
| Physonota nitidicollis, Boh. Monogr. Cassid. ii. p. 231°, and iv. p. 2537; Cat. Col. Ins. Brit. Mus. 
VV ix. p. 103°. 
